Strainer and method of assembling same



June 10, 1930. R. T. DE VOE STRAINER AND METHOD OF ASSEMBLING SAME Filed 001:. 8. 1928 UNITED STATES PATENToFFicE lmr'r nnvon, or FLINT, MICHIGAN, AssIGnon To MARVEL GARBURETOR COMPANY,

y y A conPoBA'rIon oF MICHIGAN l Application filed October 8",

iment for the fuel inlet connection to carbureters. a

bureters isfrequently dirty, carrying water, scale and dust particles in its normal state, a such foreign matter being apt to clogup the fine orifices necessary in carbureter metering nozzles, as well as affecting the seating of the float operated valve, with a possibility of .qflooding the carbureter. It is therefore an object of this invention to provide an easily and economically manufactured screen assembly for the fuel supply to the carbureter for cleaning and afterwards replaced without danger of damaging the screen or of misplacing the same and thus rendering the screen inoperative. l t V v It is also an object of this invention to provide an improved screen assembly for the purpose described that incorporates a water and sediment trap apart from the screen, so that the effective area thereof will not be impaired by the heavier particles of sediment that are first to settle out upon a' deif crease in the velocity of fuel flow due to the suddenenlargement of the fuel passage at y the chamber surrounding the screen.

Itis another object of this invention to provide an improved screen mountingineluding a permanent mounting of one end thereof in one member and a pilot member for the other end of the screen.

i Other and further important objects of this iiiveiitionwill be apparent from the disclosuresin the specification and the accom' panying drawings. V

This invention (in a preferred form) is more fully described.

3 On the drawings: a a 1 E'gurel is an elevation, partlyin section, ofa carbureter float chamber having a device embodying the features of this invention at tached thereto. 1 i

Figure 2 is an enlargedsection on the line II-IIof Figure 1. i

Figure 3 is an enlarged fragmentarysection similar to Figure 1. i

illustrated in the drawings and hereinafter inlet boss 26 into the desired position.

STRAINER AND METHOD or ASSEMBLINsAME.

192s. Saar no. 310,980.

As shown on the drawings p The carbureter float chamber structure i comprisesa bowl having a float ll'therein As is well known, the fuel supplied to carto actuate a needle valve 12 which seats in the chamber-side of a depending boss 14 on the bowl bottom. The passage in the plug 13 opens into acentral passage 15 in the boss,

which passage extends through a depending pilot boss16adapted to engage within the upper fiend of a cylindrical fine meshed screen 17. a The boss 15 is formed with a depending fcylindrical shell 18 spacedfrom the pilot 16 float chamber that can be repeatedly removed and having a seriesof perforations 19 therein. the lower endof theshell 18 being threaded to receive a closure plug 20. The closure plug is centrally recessed at 21 and has an lnltlally vertical annular groove 22-formed in l the bottom of the recess, with an inner cylindrical flange 23 projecting upwardly from the bottom of the recess. After the lower end of the screen 17 has been inserted in the groove 22, the upper edgelof the flange 23 'isexpanded or spun over into theposition shown in Figure 3 to slightly distort the lower portion of the screen and pinch the distorted portion against the wall of therecess '21. This structure forms a permanent attachment between the screen-and the plug so that when the plug is unscrewed' frorn the shell18the screen is withdrawn from the pilot boss 16 and forms! in effect an integral part of theplug. V

An annular memberQet envelops the shell 18 and is formed with a chamber 25 extending below the perforated portion of the shell to fornra sediment trap. The member 2 1 is rotatable about the shell in orderto adjust theposition of a fuelinlet boss 26*to suit anyinstallation, the upper edgeof the member 24bearing against a gasket 27 seating on a shoulder onthe boss 14;. The plug 20 is formed with a radial flange 28 which is provided to compress a second similar gasket against the lower edge of the member 24am sealing the same against leakage when the plug is drawn up tight after turning the fuel 

